Air-operated spraying means



KMay 14,y 1929. FyA. HowARTH i 1,712,617,

I* AIR OPERATED SPRAYING MEANS Filed Feb; 17, 1926 Il Il l lrNvl-:NTOR WW1? /7. Hemd/771, 4

Patented May 14, 1929.

UNITED `STATES FRANK A. HOWAR'IH, 0F NEW YORK, N. Y.

AIR-OPERATED SPRAYI'NG MEANS.`

Application filed February One object of the invention is to provide in an apparatus or device of this kind improved valves for controlling the l1qu1dspraying, or cleaning with air theobjects to be sprayed, and improved means for conven. iently manipulating the valves while the device is held in the hand.

Another object of the invention is to provide in an apparatus or device of this kind, improved nozzle means for atomizing and spraying the liquid.

Another object of the invention is to provide improved means for preventing drip fromthe liquid discharge nozzle.

Other objects of the invention are to improve generally the simplicity and eliciency of such devices and to provide a device or apparatus of this kind which is convenient, economical, durable and reliable in operation, and economical to manufacture.

Still other objects of the invention will appear as the description proceeds; and while herein details of the invention are described and claimed,the`invention is `not limited to these, since many and various changes may be made without departing from the scope of the invention as claimed in the broader claims.

The inventive features for the accomplishment of these and other objects are shown herein in connection with an improved spray device which, briefly stat-ed, includes a block mounted on a container and provided with a pair of chambers each having a valve across the chamber actuated by exterior manipulatingmeans disposed near a handle carrying the device. Suitablev means introduce air from a hose into the chambers on the inlet side of the valve; and cleaning and eduction nozzles receive air from the chambers respectively on the discharge side of the valves. A tube in the container is formed with a conical discharge head apertured through an apex,"`the eduction nozzle being provided with a et aperture alined with said apex, and additional perfor-ations for cleaning said headof drip. y i VlntheV accompanying drawing, showing by way of example, one of many possible embodiments of the invention,`

Fig. 1 is a side elevation of the device part- 17, 1926. Serial No. 88,821.

ly in longitudinal vertical section, the section being taken on the line l-l of Fig. .3, looking in the direction of the arrow of said line; i

Fig. 2 is a fragmental elevation showing the several nozzles of the spray device;

Fig. 3 is a fragmental rear elevation showinsthe air control manipulating means,- and Fig. fl is a longitudinal axial sectional View. showing the eduction nozzle. i l My .improved spray device is shown in combination with a container 5 having an exteriorly threaded mouth on which is screwed an interiorly threaded cap 6 provided with a vent 7. y i

A block 9 mounted on said cap is provided with a pair of forwardly and upwardly inclined valve receiving bores or chambers 10, each tapped at both ends and having an en-V larged forward portion forming an intermediate forwardly facing shoulder 11 on which rests a lvalve seat l2having a central passage opening each receiving avalve ball Al5 adapted to close the passage opening. A helical spring 16 is compressed between a washer 17 resting on the ball and a screw plug 18 in the upper end of each chamber, whereby the ball is yieldably closed :on the seat. i

A transverse bore 20 (Fig. 3) passes through the upper portion of the chambers 10 and a boss 21 on one .side face of the block. A coupling ferrule 22 received on said boss provided with bayonet slots Q3 receiving the ends of a transverse pin 24 passing through said bossand is provided with a hose receiving nipple 25 whereby air under pressure may be communicated to the upper part of the chambers to press the balls upon the seats.

. Threaded bushings 3() (Fig. l) in the lower ends of said chambers, each slidably receives a push` rod 3l provided with a milled louter manipulating button '32, an intermediate retaining shoulder 33 engageable with the inner face of the bushing, and a pointed inner end34 engageable with the ball to push it off its seat,to open the valve whenthe button is pressed,'thereby to communicate the air pressure to the lower part of the chamber and forward air passages 35 extending from the lower part of the chambers respectively.

An upwardly and then forwardly directed pipe 37 screwed in the tapped end of one of said forward passages is formed with a forwardly directed cleaningblast nozzle 39 for pre-cleaning the workthat is to besprayed.

A hollow inwardly open eductionfnozzle Y thereof. Y

plug 40 in the tapped end 4l of the other for-v ward passage 35 has a thick outer end wall 42 (Fig. 4) provided with a small axial eduction or jet aperture 43 (F ig. 2) and a pair of axially parallel lateral perforations 44 at each side of A threaded opening in said cap just forward of said nozzle plug receives a tube 47 (Fig. l) extending to near the bottom of said container and provided with a threaded enlarged upper end 4S screwed in said opening and formed with an upwardly pointing conical discharge head 49 having a knurled adjusting rim 50`a'nd a vertical discharge apert-urel communicating with the tube and passing out through the apex 52 of the head.

" l A knurle'd jamnut 53 on said enlarged end is engageable with ysaid capV to adjustably position said apex to 'be in line with Vsaid axial aperture 43, whereby air from the axial w aperture, blowing across said apex, draws the-liquid up the't-ube and discharge. aperture and atomizes and sprays the liquid in a direction generally forward of the eduction nozzle 40, air from said lateral perforations 44 serving'to c lean the discharge head of any drip of liquid from its apex. i

The block 9 is provided with a middle tapped bore 55 (Fig. 3) receiving the stem y 56 of a handle 57.' Said stem is disposed b'etween said buttons 32 and carries'a downy `wardly and rearwardly disposed grip 58 terminating vat its upper end near said buttonsV vin convenient position'for the thumb oftheY hand holding the gripjto manipulate either button withoutremovingthe thumb Y from the other button, `to apply cleaning air or paintVV or other liquid to the material or object to'be sprayed. It will thus be seen that I have provided meansadapted to actu- I ate the a'ir blast means to clean the material Y orfobject to 'bev sprayed by merely having pressure applied on it bythe operating finger tliat'isresting partly on the spray nozzle button-without removing the'iinger from 'othergaseous pressure has been introduced through a suitable hose on the nipple 25 into theupper part of the chambers 10, vthe device is rea y to operate, and is held inthe hand by the grip 58 with the thumb resting on both buttonsready to apply pressure to either i button 32.

60 fwise clean the article to be sprayed, onebut- V'If it yisde'sired to dust offY or dry or otherf ton 32 .isvpressed to liberate a-blast of air VIto the nozzle 39; and after the article has y been'cleaned"the otherV but-tenis pressed to emitair from thejet aperture 43 thereby to said aperture below the levelv draw the liquid up the aperture 51 and atomize and spray it forward of the device. The spraying continues only so long as the proper button is pressed.

I claim as my invention:

l. In a device of the character described the combination with a container having a pipe therein for passage therctluough of the contents of the container, of a member having a chamber therein for compressed air and an outlet for the compressed air from the chamber; and a discharge nozzle cooperating with said outlet, said nozzle being adapte and disposed for cooperating with the discharge end of said pipe for drawing the contents of the container out through said pipe by induction of the compressed air discharged by said nozzle and atomizing and sprayin said drawn-out contents and being provided with means for clearing from the exterior surface ofthe discharge end of said pipe the drip of said drawn-out contents.

2. In combination, a block provided with a forwardly and upwardly inclined valve receiving chamber, tapped at both ends und having an enlarged forward portion forming an intermediate forwardly facing shoulder. and a forward air passage from the lower part of the chaniber;a valve seat resting onsaid shoulder having a central passage opening; a ball adapted to rest on said seat to close the passage openine; a washer resting on said ball; a screw p ug in the upper end of the chamber; a. helical spring in each chamber compressed between the plug and washer, whereby the ball is yieldably closed on the seat; means for introducing com ssed air to the upper portion of the c amber; threaded bushing in the lower end of said chamber; a ush rod slidable in said bushing and provided) with lan outer manipulating button; an intermediate retaining shoulder engageable with the inner falce of the bushing, and a pointed inner end engageable with the ball to push it oil" its seat; and a nozzle herminating said forward assage.

3. In combination7 a lock provided with n pair of forwardly and upwardly inclined valve receiving chambers, each having an enlarged forward portion forming an intermediate forwardly facing shoulder; a transverse bore traversing the upper rtion of the chambers and'one side face of t e block, for ward air passages from the lower part of the chambers respectively and having tapped forward ends valves across each chamber on said shoulder; means for introducing fluid under pressure into the transverse bore; and fluid directing Vmeans receiving air from the forward passage.

4. In a device of the character described the combination with a pi for passage of liquid ltherethrough having on its discharge'end a conical nozzle provided with an aperture at its apex, of a second nozzle lil provided with an aperture ii'or discharging at a right angle to the aperture of the first nozzle iuid under compression for dra-wing the liquid out through the lirst nozzle by induction of the discharged Huid and provided with apertures arranged in the same plane in the second nozzle and be* low the plane oi the li rst mentioned aperture of the second nozzle for discharging the fluid under compression along' the conical sides of the lirst nozzle and substantially parallel. to the plane ofdischarge ci the induction fluid from the second nozzle for clearing the exterior sides ofthe apex oi the first nozzle of the drip of the drawn-out liquid.

5. In a device of the character described, in combination, a paint container, a cap on said container, a housing associated with said cap, a chamber in said housing having means lor inlet of air under pressure into one end of `the chamber, air blast nozzle meansassoci ated with aid chamber adapted to clean a surface prior to coating with paint, a valve seat member arranged intermcdiately of the ends or' said chamber' transversely of the chamber and having a valve opening therethrough, a ball valve disposedin said chamber at the air inlet end thereof for cooperating with said valve seat, and a push member located in said chamber at the end thereof opposite the air inlet end and having a slimly pointed end portion passing through said valve opening and engagino said ball valve for moving the valve from closing position to open position whereby air passes through said valve opening from the air inlet end of said chamber to the nozzle lneans.

6. In combination, a container, a cap thereon, a block mounted on said cap provided with an elongated chamber, a boss on one side face, and a transverse bore across the upper portion of said chamber and surrounded by said boss, a transverse pin passing through said boss, and a coupling ferrule received on said boss and provided with bayonet slots receiving the ends of the pin, and provided with a hose receiving nipple, whereby air under pressure is communicated to the upper part oi the chamber, a nozzle receiving air from the chamber, and liquid supply means cooperating with the nozzle to produce a paint spray.

Signed at New York, in the county of New York, and State of New York, this 16th day 0i' February, A. D. 1926.

FRANK A. HOWARTH. 

